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Dairy Cattle And Reproduction

Subjects : industries, dairy
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. (male) pushes the testes outward toward the legs for a cool-down off of the body






2. % of fat in milk. makes cheeses and ice cream. regulates cost of milk






3. Boars and stallions-> deliver semen directly into the cervix. bulls and rams-> deliver semen into the vagina.






4. What helps regulate spermatogenesis?






5. (FSH) causes egg to mature in females






6. Organ of copulation - provides passageway for semen and urine - muscular organ characterized especially by its spongy - erectile tissue that fills with blood






7. Prevent the cow from getting an infection from the calve






8. To remove/separate testicles from animal's body before animal reaches puberty






9. 2 month growth cycle. stored in the epididymis of the bull






10. Produce testosterone. located between the seminiferous tubules






11. 4-6 days






12. Pulls sperm and egg together - gets body ready for pregnany - stimulates growth cells - develops mammary glands - starts to deposit fat.






13. ~305 days (altough often longer due to breeding difficulties)






14. 1-3 days






15. Superior genes are _______ to multiply






16. Constitute 50-90% of the volume of the ejaculate. (3 glands total: seminal vesicles - prostate gland - cowper's gland)






17. (male) definition: duct located outside of the testes. 3 parts: head - body - tail. 4 Functions:concentrate sperm - store sperm - transport sperm - site of sperm maturation. entire process takes ~40-60 days






18. 1. to eliminate breeding the females at an early age - 2. makes animals less lean and provides a better cut for the market






19. 24 hours before end of estrus cycle






20. 1-2 days






21. Days which have decreasing daylight hours

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22. Can produce 200 calves naturally (~100 bulls) - top 1-2% will grade like him. everything left to chance if no AI performed






23. 14-19 (17) days






24. 1. seminiferous tubules - 2. sertoli cells - 3. leydid or interstitial cells






25. Largest dairy cow - largest udder - highly vascular - eat 40-50% dry matter (eat alot) - most total butterfat






26. 26 hours after estrus begins






27. Birthing process (termination of gestation)






28. Cleans and lubricates the urethra. secretion is thick - viscous - and very slippery.

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29. (LH) causes female's egg to break (her period)






30. 1. to eliminate breeding the females at an early age - 2. makes animals less lean and provides a better cut for the market






31. 1. need to be restricted in amt of grain - 2. no more than 70% of ration can be concentrates. 3. *Acidic acid has to be produced in order for milk synthesis to occur (30% forages)






32. Located directly in front of the cervix. fertilized egg implants here. connected to two uterine horns. implantation occurs on the same side as ovulation occurred.






33. 283 days






34. Earlier you castrate a male - the easier it is on the animal. the longer you wait - death rates increase






35. Why does estrus happen before ovulation?






36. (male) pushes the testes upward toward the body for warmth or protection






37. Male on one pin and female on other side






38. 14-19 (17) days






39. Urinary calculi.






40. 19-23 (21) days






41. 147 days






42. Way to know everything is alright with the breeding male






43. ~60 days before calving






44. Animals which have many estrous periods per year (ex: cow - sow)






45. Duct through penis that carries sperm and urine






46. So when offspring are born - there is more food to be found for energy stores and fat deposits IN THE SPRING






47. Luteolysis happens because of the ____________ hormone






48. What about the sperm for a bull which has been castrated but still has testicles?






49. Implies the amount of estrogen production






50. The more stressed out the male is - the less sperm he is going to produce